fix: use nightly instead of 1.6

Author: aminya

.github/workflows/SnoopCompile.yml

@@ -18,7 +18,7 @@ jobs:
 
       matrix:
         version:   # NOTE: if not using `yml_path`, these should match the version in `BotConfig`
-          - '1.6'
+          - 'nightly'
           - '1.5.3'
           - '1.4.2'
           - '1.3.1'